Created
October 25, 2016 18:01
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pub trait HasAcs { | |
fn valid(&self) -> bool; | |
fn from_row(row: &HashMap<&str, &str>) -> Self; | |
fn file() -> &'static str; | |
} | |
fn process_acs<T: HasAcs + diesel::query_builder::AsChangeset>() { | |
use schema::locations::dsl::*; | |
let conn = establish_connection(); | |
let mut reader = Reader::from_file(T::file()) | |
.unwrap() | |
.has_headers(true); | |
let headers = reader.headers().unwrap(); | |
for row in reader.records() { | |
// ... extra processing elided like populating map, zip and loc_id variables or whatever | |
let it = T::from_row(&map); | |
if it.valid() { | |
let _ = diesel::update(locations.find(loc_id)) | |
.set(&it) // <- here | |
.returning(id) | |
.get_result::<i32>(&conn) | |
.expect(&format!("Couldn't update zip {}", &zip)); | |
} else { | |
println!("Error on {:?}", &zip); | |
} | |
} | |
} | |
Compiling import v0.1.0 (file:///Users/jeff/dev/car-insurance/database/import) | |
error[E0277]: the trait bound `&T: diesel::query_builder::AsChangeset` is not satisfied | |
--> src/lib.rs:380:18 | |
| | |
380 | .set(&it) | |
| ^^^ trait `&T: diesel::query_builder::AsChangeset` not satisfied | |
| | |
= help: consider adding a `where &T: diesel::query_builder::AsChangeset` bound | |
error[E0277]: the trait bound `models::Demographics: diesel::query_builder::AsChangeset` is not satisfied | |
--> src/lib.rs:391:5 | |
| | |
391 | process_acs::<Demographics>(); | |
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^ trait `models::Demographics: diesel::query_builder::AsChangeset` not satisfied | |
| | |
= help: the following implementations were found: | |
= help: <&'update models::Demographics as diesel::query_builder::AsChangeset> | |
= note: required by `process_acs` |
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